Cisco Headend Service Pack 2 for SR 2.2 3.2 User Guide
Chapter 9 Monitor DHCTs with the DHCT Status Reporting Utility
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Having multiple clusters of DHCTs, as illustrated in this example, is normally not a
problem. Non-responding DHCTs begin to appear only when delay values fall
below the 134 microsecond range, as designated by the Too Distant label along the
x-axis.
problem. Non-responding DHCTs begin to appear only when delay values fall
below the 134 microsecond range, as designated by the Too Distant label along the
x-axis.
Delay Value Analysis
The second part of the DHCT Delay Value Saturation Report provides a detailed
breakdown of the graphical data displayed in Graphical Distribution of DHCT Delay
Values, earlier in this section. This part of the report contains the following data:
breakdown of the graphical data displayed in Graphical Distribution of DHCT Delay
Values, earlier in this section. This part of the report contains the following data:
A listing of the QPSK modulator and associated demodulators
Note: In the following example, Modulator QPSKMOD1 is configured with
eight demodulators.
Note: In the following example, Modulator QPSKMOD1 is configured with
eight demodulators.
The average and the median delay values for the modulator and each
demodulator
demodulator
A detailed listing showing the number of DHCTs with each delay value
The data confirms the existence of two distinct clusters of DHCTs, with each cluster
located a distinct radius away from the modulator.
located a distinct radius away from the modulator.
7,150 DHCTs have a delay value of approximately 745 ms
Note: These DHCTs correspond to the cluster situated over the Close to
Headend label along the x-axis of the graph shown under the Graphical
Distribution of DHCT Delay Values heading, earlier in this section.
Note: These DHCTs correspond to the cluster situated over the Close to
Headend label along the x-axis of the graph shown under the Graphical
Distribution of DHCT Delay Values heading, earlier in this section.
24 DHCTs have a delay value of approximately 300 ms
Note: These DHCTs correspond to the cluster located over the Far from
Headend but Within Range label along the x-axis of the graph shown under the
Graphical Distribution of DHCT Delay Values heading, earlier in this section.
Note: These DHCTs correspond to the cluster located over the Far from
Headend but Within Range label along the x-axis of the graph shown under the
Graphical Distribution of DHCT Delay Values heading, earlier in this section.